Contribution to the textural characterisation of Filtrasorb 400 and other commercial activated carbons commonly used for water treatment

The textural characteristics of three commercial activated carbons, Filtrasorb 400 (F400), Industrial React High Affinity and Picabiol, commonly used in water treatment, are reinvestigated. Nitrogen physisorption isotherms are determined in the range P/P (0) = [4 x 10(-7)-0.998] and processed using BET, alpha(S) (Sing), Dubinin-Radushkevich and Density Functional Theory methods. In addition, fractal dimensions are determined by the Frenkel-Halsey-Hill procedure. Since F400 is often considered as a reference material in studies on the adsorption of solutes in aqueous solutions, a review of the textural characteristics of this carbon is carried out. The results obtained in this work using the different methods are consistent and a critical crossed comparison of these results allows discussing the limitations of the methods used. In particular, the impact of the P/P (0) range considered on S (BET) value is examined. In addition, the accuracy of the BET specific surface area is assessed in the light of information from recent literature.